Dreams or a vision of animals transforming tell you about changes, possibilities and adjustments that are coming your way in your life. Another explanation is that transformation stands for split soul, doubts, twin soul and difficulties in acceptance. Yet another explanation is experiencing a totally different side of your character or the realization of your dark qualities. This can be experienced both positively and negatively.
It tells you something about a transition period, with possible external influences. Pay close attention to what the animal changes, this tells a lot about the situation you are in and / or what you can work on. As an alternative explanation you can also think of not being able to make choices, it becomes A or B, postponing and ignoring signals. An additional explanation could be that the transformation has a connection with thinking outside the box, looking through the eyes of a child or even stepping outside the bounds of the possibility.
If a transformed animal attacks you in your dream or vision, it tells you that the transformation or adjustments will be approaching you very quickly. Another explanation is experiencing and acknowledging the dark and dark side of your character traits. Yet another explanation is that the transformation, the changes overwhelm you, fear and trauma, stress and burnout experiences.